期刊
NATURE COMMUNICATIONS
卷 7, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms11002
关键词
-
资金
- EU (ERC) [279313]
- EU (EC) [631396]
- EU (FEDER) [CTQ2014-56295-R]
- Spanish Ministerio de Economia y Competitividad (MINECO) [CTQ2014-56295-R, RYC-2012-11133, RYC-2012-11231, CTQ2014-52974-REDC, SEV-2013-0319]
- Comunidad de Madrid (project MAD2D)
- Generalitat de Catalunya [2014-SGR-797]
- ICIQ Foundation
- IMDEA Foundation
- European Research Council (ERC) [279313] Funding Source: European Research Council (ERC)
- ICREA Funding Source: Custom
On-surface synthesis is a promising strategy for engineering heteroatomic covalent nanoarchitectures with prospects in electronics, optoelectronics and photovoltaics. Here we report the thermal tunability of reaction pathways of a molecular precursor in order to select intramolecular versus intermolecular reactions, yielding monomeric or polymeric phthalocyanine derivatives, respectively. Deposition of tetra-aza-porphyrin species bearing ethyl termini on Au(111) held at room temperature results in a close-packed assembly. Upon annealing from room temperature to 275 degrees C, the molecular precursors undergo a series of covalent reactions via their ethyl termini, giving rise to phthalocyanine tapes. However, deposition of the tetra-aza-porphyrin derivatives on Au(111) held at 300 degrees C results in the formation and self-assembly of monomeric phthalocyanines. A systematic scanning tunnelling microscopy study of reaction intermediates, combined with density functional calculations, suggests a [2 + 2] cycloaddition as responsible for the initial linkage between molecular precursors, whereas the monomeric reaction is rationalized as an electrocyclic ring closure.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据